Search for dissertations about: "struts"

Showing result 1 - 5 of 17 swedish dissertations containing the word struts.

  2. 1. Nonlinear micromechanics of open-cell cellular solids

    Author : Per Hård af Segerstad; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FEM; Finite strains; Foams; Micropolar theory; Constitutive modelling;

    Abstract : An approach for modelling the response of open-cell cellular solids at finite strainsis developed. The model framework comprises a mechanistic formulation wherethe cellular solid is considered as a network of struts, each connecting two vertexpoints. READ MORE

  4. 2. Analytical and Parametric Study of Damped Vibrations in Gough-Stewart Platforms

    Author : Behrouz Afzali Far; Mekanik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This work establishes a comprehensive and fully parametric model for the damped vibrations of Gough-Stewart Platforms (GSPs) at symmetric configurations. It is noteworthy that in the literature a complete solution to this problem has not been presented. This work has been carried out in three stages which are the subjects of Papers I, II and III. READ MORE

  5. 3. Fluid mechanical simulations and development for vertical axis turbines

    Author : Anders Goude; Uppsala universitet; []
    Keywords : ;

    Abstract : The aerodynamics of vertical axis turbines is typically studied using streamtube, vortex or CFD models. This thesis focuses on the first two models, which are the computationally faster ones. READ MORE

  6. 4. A new perspective on avian phylogeny - a study based on mitochondrial genomes

    Author : Anna Bartosch-Härlid; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Genetics; thyroid; neoteni; mitochondrial DNA; phylogeny; Class Aves; Palaeognathae; cytogenetics; Genetik; cytogenetik;

    Abstract : The Class Aves (birds) is generally divided into two main groups - the Palaeognathae and the Neognathae. Paleognathous birds are the flightless ratites and the tinamous, while Neognathae include all other extant birds (more than 9,000 species). READ MORE

  7. 5. Fluid Mechanics of Vertical Axis Turbines : Simulations and Model Development

    Author : Anders Goude; Olov Ågren; Carlos Simão Ferreira; Uppsala universitet; []
    Keywords : Wind power; Marine current power; Vertical axis turbine; Wind farm; Channel flow; Simulations; Vortex model; Streamtube model; Control system; Graphics processing unit; CUDA; Fast multipole method; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Two computationally fast fluid mechanical models for vertical axis turbines are the streamtube and the vortex model. The streamtube model is the fastest, allowing three-dimensional modeling of the turbine, but lacks a proper time-dependent description of the flow through the turbine. READ MORE